桥面径流污染物测试试验及处理方法研究  

Research on Test Test and Treatment Methods of Pollutants in Bridge Deck Runoff

作　　者：武新成 陈学平[2] 简丽[2] 姚嘉林[2] Wu Xincheng;Chen Xueping;Jian Li;Yao Jialin(Xinjiang Communications Construction Group Co.,Ltd.,Urmuqi 830016,China;China Academy of Transportation Sciences,Beijing 100029,China)

机构地区：[1]新疆交通建设集团股份有限公司,乌鲁木齐市830016 [2]交通运输部科学研究院,北京市100029

出　　处：《北方交通》2022年第6期47-50,共4页Northern Communications

摘　　要：桥面沉积污染物被桥面径流带入水体,易造成水体污染,采集桥面沉积物与桥面径流样品,进行污染物粒径分析,通过对桥面径流沉降性能试验、溶解性试验以及加聚合氯化铝(PAC)和聚合硫酸铁(PFS)两种净水药物混凝试验,得出桥面径流中最主要的污染物是SS,沉淀对粒径大于280μm的悬浮颗粒物有明显的去除效果,COD指标通过沉淀的去除率约为70.4%,NH3-N的含量在沉淀前后基本没有变化,TP通过沉淀约有80%的整体去除率,Zn和Cu的沉淀去除率分别为60.32%和60.70%,Pb的沉淀去除率为18.36%;过滤能够有效去除径流中的细小颗粒及其携带的污染物,在合适的剂量下,加药混凝对污染物去除效果相对更好,但是设备相对复杂,根据试验分析和方案比选,采用沉淀+过滤+外排边沟的方法来处理桥面径流污染物更为有效。The pollutants deposited on the bridge deck are brought into the water body by the bridge deck runoff,which is easy to cause water pollution.The samples of bridge deck sediment and bridge deck runoff are collected for pollutant particle size analysis.Through the settling performance test,solubility test and coagulation test with two kinds of water purification drugs like Poly Aluminium Chloride(PAC)and Polymeric Ferric Sulfate(PFS),it is concluded that the most important pollutant in the bridge deck runoff is SS,precipitation has obvious removal effect on suspended particles with particle size greater than 280μm,the removal rate of COD index through precipitation is about 70.4%,the content of NH3-N basically does not change before and after precipitation,TP has about 80%overall removal rate through precipitation,the precipitation removal rates of Zn and Cu are 60.32%and 60.70%respectively,and the precipitation removal rate of Pb is 18.36%;filtration can effectively remove the fine particles in the runoff and the pollutants carried by them.At the appropriate dose,dosing coagulation has a relatively better effect on the removal of pollutants,but the equipment is relatively complex.According to the experimental analysis and scheme comparison and selection,the method of sedimentation+filtration+external drainage ditch is more effective to treat the pollutants in the bridge deck runoff.

关 键 词：桥面径流 桥面沉积物 悬浮颗粒物 沉淀 过滤 加药混凝 

分 类 号：X131[环境科学与工程—环境科学]